Cover-applying die construction



April 6 1926. 1,579,467

w. E. cHRlsTMAN r AL COVER APPLYING DIE CONSTRUCTION Filed Jan. 5, 19243 Sheets-Sheet 1 i/Eeir v April 6,1926. 1,519,461, w. E CHRISTMAN ET ALcovER APPLYING DIE coNsTRucTIoN Fi1e d Jan. 5, 1924 3 Sheets-Sheet 2[liven/Z0214 A ril 6,1926. 1,579,467

w, E. CHRISTMAN El AL.

COVER APPLYING DIE CONSTRUCTION Filed Jan. 6, 1924 3 Sheets-Sheet 5 Yfzveiafans' mneasag, cm i QAMMQJ Ml. Warren;

will be withdrawn from the notch 49 and the springs 46 will move thebase die 43 upward. The upward movement of the base die is arrested by adisk onv the post 44, said disk being of larger diameter than the bore45. Thus the base die can only raise to the height shown in Figure 3.

The die block 39 is provided with two channels 56 and 57 to the rear ofthe chamber 42. These channels are cut in the top of said die block andform slide-ways for two bars58 and 59. Two lateral plate dies 60 and 61are slidably mounted on the top surface of the die block 39 and aresecured respectively to the bars 58 and 59. These plate dies haveoperating edgesr62 and 63 which correspond in shape tothe end walls 47of the chamber 42. The edges 62 and 63 intercept points 64 and 65 on theplate dies 60 and 61. Said pointed parts 64 and 65 are directly abovepointed parts 66 and 67 of the die block 39. The upper surface of theplate dies 60 and 61 are preferably beveled or slightly rounded adjacentthe edges 62 and 63 for a purpose hereinafter rendered obvious.

A lever 68 has a hub 69 which is pivot-ally mounted in a bore 70 in thedie block 39, said here at its top communicating with the channels 56and 57 The hub 69 has a cam 71 at its top located between the inner endsof the bars 58 and 59. The bars 58 and 59 have screws 72 and 73 securedthereto and said screws extend outward through slots 74 and 75. A coiledspring 7 6 has its opposite ends secured to the springs 72 and 73 and isoperative to move the bars 58 and 59 toward each other and consequentlymove the lateral plate dies 60 and 61 toward each other when permittedto do so by the cam 71. Figure 2 of the drawings shows the lever 68 insuch a position that the cam 71 will hold the plate dies 60 and 61 apartagainst the action of the spring 76. However, if the lever 68 is swungtoward the right, the cam 71 will move into such position as to allowthe spring 7 6 to move the plate dies 60 and 61 slightly toward eachother. A plate 77 is secured to the top of the die block 39 and servesto limit the movement of said plate dies 60 and 61 toward each other andalso serves as a cover for the top of the bore 70 and the cam 71.

The die 37 as clearly shown in Figures 1 and has rounded ends 78adapted, when the plunger 30 moves downward, to enter the space betweenthe end walls 47 of the chamber 42. Furthermore, said die 37 when moveddownward will be operative to move said base die 43 downward aspreviously described, which action occurs during the application of acover to a case as will be hereinafter specifically described. The die37 has two fingers 79, the bottom surfaces 80 of which are positionedabove the bottom surface 81 of the main body 82 of said die 37.These'fingers 79 are operative to assist in aflixing parts of the coverto the pocket of cludes an overlaying flange which provides a' pocket ofwell known formation in the manufacture of eye-glass cases. A coiledspring 141 has one end secured to the lid and the other end secured to alooped anchoring member 142 in the body 137; the hinge 139 beingdiscontinued at the place where the spring extends into the body. Saidcase is of a well known construction and the arrangement of the springpresents the advantage of holding the lid open when the lid is movedinto a certain position and also for holding the lid closed afterthe'lid has been moved past what is known as the dead center during theclosing action. In Figure 5 we have shown a cover 143 in the form of acut blank. This cover can be made of leather, imitation leather orprocessed cloth and the surface 144 is coated with glue capable ofadhering to the surface of the case when heated and pressure is appliedas will be more thoroughly comprehended in the following description.

In carrying out the covering operation of said case with theseries ofdies above described, the operator, while the base die 43 is held downby the latch 50, places the body 137 of the case within the chamber 42so that the bottom of said body rests upon the top of the base die 43with the pocket140 of the case toward the rear. The lever is then swungto move the die 37 downward into the body of the case and since said die37 is heated, the heat will be transferred to the body of the case. Thelatch 50 is then released by pressing the portion 53 of the lever 51 andthe lever 33 is then swung to raisethe die 37; the springs 46operating-to raise the base die 43 into the position shown in Figures 1and 3. The operator then removes the heated case and places it on theblank cover in the position shown in Figure 5, the bottom of the bodyengaging the glued sur face of the cover blank. The cover and the caseso positioned thereon is then placed upon the top of the base die 43 andthe top die 37 is moved downward into the body portion in the samemanner as previously described. This action will cause the side flaps145 and tab portions 146 to be bent upward against the outer endsurfaces 147 of the body 137, the end walls 47 of the cham-- ber 42serving to press the parts 145 and 146 of the cover against the ends ofthe body l tand ing action of the cover across the bottom of the bodylow any wrinklesto eXist and the action will result in a smooth firmapplication of the covering material to the bottom and outer ends of thebody .137. The latch'50 will automatically move into the notch the basedie 43 in its lowered position. The

top die 37 is then raised and the lever 68 is v swung to allow thelateral platedies 60 and 61 tomove towardeach other and in so doing theedges 62 and 63 will bend the parts 1&6 inward over the top of the endsof the body- 137 into the position clearly downward into the body shownin Figure'G; the parts 146 being positioned over the top surface of thepocket i'lange'l lO while the, parts 145 extend-over the space betweenthe pocket and the rearof the body. The top die 37 is again moved actionthe fingers '79 will press the parts 146 "into 'firm holding contactwith the upper surfaceof the pocketflange MO and the ends 78 of the die37 will press" the overhanging parts 145 into engagement with the innersurfaces of the ends of the body 137. r Fig ure 7 of the drawingsshowsthe. cover after I said latter part of the operation. The'casefirmly to the, cases. I

form of glue or paste is'used which does not is then removed from thedie- 13 and the remaining portions 148 and 150 of the cover canbeapplied to the case flange 140 and lid 138 by means-not claimed in thisapplication We have found that heating the die structure and using gluewhich when heated will adhere to the cases, the covers will hold Howeverif any other be heated in order to adhere to require to then it will beunderstood that it the cases,

7 will be unnecessary to heat the dies.

which a cover with a superimposed case body can be positioned; .a diemovable relatively to said die block and operative to rno've said casebody to causesaid first die to move within the chamber and therebyefiect the stretching of the cover over the bottom of the case body andthe turning of portions of the cover upwardly against the outer sidesurfaces thereof; automatically operative means for holding said firstdie after said movement; transversely movabledies operative to bend saidupwardly turned portions of the cover inwardly over the top edges of thecase body, said second mentioned die being operative to move into thecase body and 137 will be efitected so as not to a1-.

49 to lock and during this mentioned die is raised.

bend and press said inwardly bent/portions of the cover into engagementwith the inner side surfaces of the case body; and means for returningsaid first mentioned die to its normal position'fatter its holding meansis released. I y

2. In a cover-applying construction for an-eye-glass case having a bodywith a pocket flange spaced above and overlaying the bottom of the bodybetween flanged ends thereof, a series of diesincluding a die upon whicha cover with said body-thereon can be'placed; dies'for turning portions"ofsaid cover against the outer portions of said flanged ends and overthe tops thereof and other portions over said pocket flange; and p y adie having a portion movable into the body and having parts operativetopress said latter portions of the cover into engagement with said pocketflange. I

- 3. In a'cover-applymgconstruction for casesof the'chara'cterdescribed, a series of dies including'a'die block having a chamber a diesl dably fitting said chamber and upon which a cover with a casesuperimposed can be positioned; a die movable relatively to said blockand operative to move said case body to cause said first die to movedown wardly in said chamber; spring means for moving said first die inan opposite'direc- 7 tion; and an automatically operative latch for'holding said first die against the move ment of said spring means whenthe second j 4.. In a cover-apply ng construction for cases of thecharacter described, a series of dies including a die block havingachamber; a die slidably fitting said chamber and upon which a coverWlth a case superimposed can be positioned; a die movable relatively tosaid die block and operative to move said case boclyto cause said firstdie to move downwardly in said chamber; spring tive meansfor moving saidlatch into said notch to hold said first die against movement of saidspring means.

5. In a cover-applying. construction for cases, a series ofdlesi'ncluding a die block having. a die chamber; slidably mounted platedies; spring means for moving said plate dies to overhang move said saidspring means so as not to overhang said chamber. p I V In testimonywhereof we havesigned our names to this specification.

' WILLIAM CHRISTMAN.

ROY L, WARREN.

means for moving said first die in an opposite direction; a post on saidfirst die having I I a notch; al'atch; and automatically opera-; a

said chamber; and a -pivoted lever having a cam operative to plate diesagainst theaction of

